Preheat the oven to 350° F. In a large mixing bowl or bowl of a stand mixer, cream together the unsalted butter, peanut butter, light brown sugar, and granulated sugar. Add in the eggs and vanilla and mix until well-combined.
In a medium mixing bowl, combine the all-purpose flour, graham cracker crumbs, baking powder, baking soda, and sea salt.
Add the flour mixture to the peanut butter mixture and mix until just combined. Fold in the chocolate chips, dehydrated marshmallows and graham cracker pieces.
Scoop cookie dough onto a baking sheet 2 inches apart and use a spoon or the palm of your hand to flatten the cookies slightly. Place a mini marshmallow and chopped chocolate bar piece on top of each cookie.
Bake for 8-10 minutes, or until edges are set (center will still be soft). Allow cookies to cool on baking sheet for 10 minutes before removing to a wire rack to cool completely.
Calories: 115kcal | Carbohydrates: 15g | Protein: 2g | Fat: 5g | Saturated Fat: 3g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 2g | Trans Fat: 1g | Cholesterol: 12mg | Sodium: 97mg | Potassium: 71mg | Fiber: 1g | Sugar: 8g | Vitamin A: 70IU | Calcium: 14mg | Iron: 1mg